Unverified Commit 39688877 authored by Jean-Jacques Hiblot's avatar Jean-Jacques Hiblot Committed by Mark Brown
Browse files

ASoC: tas6424: Allow disabling auto diagnostics for faster power-on 



The TAS6424 incorporates both DC-load and AC-load diagnostics which are
used to determine the status of the load. The DC diagnostics runs when any
channel is directed to leave the Hi-Z state and enter the MUTE or PLAY
state.
The DC diagnostics are turned on by default but, if a fast startup without
diagnostics is required, the diagnostics can be disabled using a dedicated
ALSA control.

Signed-off-by: default avatarJean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a7ea9385

sound/soc/codecs/tas6424.c

+11 −2
Original line number Diff line number Diff line
@@ -64,6 +64,8 @@ static const struct snd_kcontrol_new tas6424_snd_controls[] = { 
		       TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv),

	SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume",

		       TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv),

	SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1,

			  TAS6424_LDGBYPASS_SHIFT, 1),

};



static int tas6424_dac_event(struct snd_soc_dapm_widget *w,
@@ -297,6 +299,11 @@ static int tas6424_power_on(struct snd_soc_component *component) 
	struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);

	int ret;

	u8 chan_states;

	int no_auto_diags = 0;

	unsigned int reg_val;



	if (!regmap_read(tas6424->regmap, TAS6424_DC_DIAG_CTRL1, &reg_val))

		no_auto_diags = reg_val & TAS6424_LDGBYPASS_MASK;



	ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),

				    tas6424->supplies);
@@ -327,8 +334,10 @@ static int tas6424_power_on(struct snd_soc_component *component) 
	snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, chan_states);



	/* any time we come out of HIZ, the output channels automatically run DC

	 * load diagnostics, wait here until this completes

	 * load diagnostics if autodiagnotics are enabled. wait here until this

	 * completes.

	 */

	if (!no_auto_diags)

		msleep(230);



	return 0;

sound/soc/codecs/tas6424.h

+4 −0
Original line number Diff line number Diff line
@@ -111,6 +111,10 @@ 
					 TAS6424_CH3_STATE_DIAG | \

					 TAS6424_CH4_STATE_DIAG)



/* TAS6424_DC_DIAG_CTRL1 */

#define TAS6424_LDGBYPASS_SHIFT		0

#define TAS6424_LDGBYPASS_MASK		BIT(TAS6424_LDGBYPASS_SHIFT)



/* TAS6424_GLOB_FAULT1_REG */

#define TAS6424_FAULT_CLOCK		BIT(4)

#define TAS6424_FAULT_PVDD_OV		BIT(3)

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